Title: The misuse and abuse of SPC: A case study examination

Authors: D. Bird, B.G. Dale

Addresses: Quality Management Centre, Manchester School of Management, UMIST, PO Box 88, Manchester, M60 lQD, UK. ' Quality Management Centre, Manchester School of Management, UMIST, PO Box 88, Manchester, M60 lQD, UK

Abstract: A study has been carried out of the application of SPC at an automotive supplier specializing in the manufacture of small, high-precision integrity metallic components. The technique has been introduced successfully and a number of benefits realized. However, there are certain operational difficulties with its use which may lead to frustration if left unchecked. These include: (a) variation in measurement methods; (b) lack of a reaction plan to out-of-control points; (c) failure to note on the chart any additional samples which have been taken and other changes to the process; and (d) a failure to undertake gauge variation studies. These difficulties are discussed together with the means of resolving them.

Keywords: control charts; DTI; gauge systems; flyers; management commitment; measurement systems; processes; R&R studies; ring measurement; SPC; statistical process control; SPC coordinators; training; automotive suppliers; automobile industry.

DOI: 10.1504/IJVD.1994.061908

International Journal of Vehicle Design, 1994 Vol.15 No.1/2, pp.99 - 107

Published online: 28 May 2014 *

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